CN102021630A - Coaxial heterogeneous ceric dioxide nanotube-titanium dioxide nanotube array thin film - Google Patents
Coaxial heterogeneous ceric dioxide nanotube-titanium dioxide nanotube array thin film Download PDFInfo
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- CN102021630A CN102021630A CN 201110002998 CN201110002998A CN102021630A CN 102021630 A CN102021630 A CN 102021630A CN 201110002998 CN201110002998 CN 201110002998 CN 201110002998 A CN201110002998 A CN 201110002998A CN 102021630 A CN102021630 A CN 102021630A
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Abstract
The invention discloses a coaxial heterogeneous ceric dioxide nanotube-titanium dioxide nanotube array thin film and a preparation method thereof. The thin film disclosed by the invention has a unique nano composite tube structure characteristic; the thickness of the thin film, the diameter of outer tubes and the diameter of inner tubes can be controlled freely according to functional needs; and the thin film has an excellent semiconductor characteristic and high sensitivity, and can be mainly used in fields of oxygen sensors, photoelectric nano elements and the like.
Description
Technical field
The invention belongs to the inorganic semiconductor technical field of nano material, relate to a kind of coaxial heterogeneous two-tube: cerium dioxide nano-tube-titanium dioxide nano-pipe array thin film and preparation method thereof.
Background technology
Orderly TiO
2Nano-pipe array thin film becomes one of focus of nano materials research because of it has excellent photoelectricity, catalysis, sensing capabilities.Because this material and powder nano-TiO
2Film is compared has bigger specific surface area and stronger adsorptive power, and its potential Application Areas is also more wide, and at present, many scientific research institutions have carried out its applied research in a lot of fields such as susceptible device susceptor, photochemical catalysis, biomaterial.
TiO
2Nano tube structure has oldered array structure formation, uses this material and can improve the transmission life-span of photogenerated charge and reduce its recombination probability.So TiO
2Nano-tube array can be used for aspects such as high sensor, fuel dye sensitization solar battery, hydrolytic hydrogen production.Ti0 at room temperature for example
2Nano-tube array can be tested the hydrogen content (TiO behind the chemisorption hydrogen of 1000 μ l/L
2The nano-tube film electricity is led increases by 8 orders of magnitude), this be known at present to the sensitive material of hydrogen.Nearest applied research also comprises dye sensitization solar battery.By orientation growth, arrangement and the crystalline structure etc. of control nanotube, make nanotube between the interface, have excellent electron-osmosis transmission path, utilize this class Ti0
2Fuel sensitization solar battery system electricity conversion under the AM1.5 condition of nano-pipe array thin film assembling has reached 6.9%.Orderly TiO
2Nano-pipe array thin film also has significant photolysis water characteristic, and (under 320～400nm) irradiations, the electricity conversion of the nano-tube array of report can reach 16.25% at present in UV-light.In addition, nano-pipe array thin film can form the orderly doubled via structure of marshalling, can be applicable to high-tech sectors such as microfluidic control, molecular filtration, drug conveying and bioengineered tissue.
For further expanding TiO
2The spectral response scope of nano-tube array, suppress the compound of photo-generated carrier, to TiO
2The focus that nano-tube array is modified, modification becomes research.For example, the patent No. is that 200710188544.5 Chinese patent " a kind of coaxial double-pipe titanium dioxide nano-pipe array thin film and preparation method thereof " discloses the coaxial double-pipe titanium dioxide nano-pipe array thin film that a kind of chemical ingredients is Nb, Mo, Zr, 0, Ti, and film has significant semi-conductor over-all properties, excellent photocatalytic performance, good biological activity.
Cerium dioxide nano-tube has excellent photocatalysis performance and redox property, is considered to the ideal catalystic material.But not seeing as yet by retrieval has coaxial heterogeneous CeO
2Nanotube-TiO
2The report of nano-pipe array thin film.
Summary of the invention
At the deficiencies in the prior art, the problem to be solved in the present invention provides a kind of coaxial heterogeneous CeO
2Nanotube-TiO
2Nano-pipe array thin film and preparation method thereof.Utilize the present invention can successfully realize the preparation of coaxial heterogeneous nano combined tubular construction.
Coaxial heterogeneous cerium dioxide nano-tube-titanium dioxide nano-pipe array thin film of the present invention is characterized in that described film is made by following method:
(1) titanium foil is machined into the sheet of 10 ± 2mm * 20 ± 5mm, with 240
#, 360
#, 500
#, 800
#, 1200
#Or 1500
#The sand papering light, adopting granularity again is that 1.0 diamond polishing cream carries out mechanical polishing, adopts ultrasonic wave ultrasonic oil removing 2～5 minutes in ethanol, acetone successively subsequently, carries out rinsing with deionized water afterwards, after the oven dry, stand-by;
(2) being anode with the titanium foil after handling, is negative electrode with the platinized platinum, contains 0.3～0.5wt%NH
4F (weight percent) and 2～5vol%H
2The ethylene glycol solution of 0 (volume percent) is an electrolytic solution, under room temperature and magneton stirring, carries out electrochemical reaction; Wherein: interelectrode distance is 30 ± 2mm, and voltage is 20～60V, anodizing time 12～24 hours;
(3) with the rinsed with deionized water generation TiO is arranged
2The anode of nano-tube array---titanium foil, after the drying, supersound process is 0.5～1 hour in the hydrochloric acid soln of immersion 0.8～1.5mol/L, dissolves TiO
2Nanotube;
(4) with the described anode of step (3)---titanium foil remakes anode, repeating step (2) carries out two-step anodization;
(5) with ethanol, deionized water respectively rinsing generate TiO arranged
2The anode of nano-tube array---titanium foil 5～6 times, anneal is carried out in dry back in retort furnace, and the control temperature rise rate is 1～2 ℃/min, and the flat-temperature zone temperature range is 500～700 ℃, and the flat-temperature zone treatment time is 0.5～2 hour, obtains to be covered with porous TiO
2The titanium substrate of nano-tube array;
(6) step (5) preparation is covered with porous TiO
2It is the cerous nitrate (Ce (NO of 1～1.5mol/L that the titanium substrate of nano-tube array immerses concentration
3)
36H
2O) in the aqueous solution, reacted 0.5～1.5 hour;
(7) with the thermal treatment 2～5 minutes in microwave oven of the reacted titanium substrate of step (6), obtain the coaxial heterogeneous CeO of one deck at the titanium substrate surface
2Nanotube-TiO
2Nano-pipe array thin film.
Wherein:
Above-mentioned titanium foil purity is preferably greater than 95%.
Above-mentioned electrolytic solution is preferably and contains 0.4～0.5wt%NH
4F (weight percent) and 3～4vol%H
2The ethylene glycol solution of O (volume percent).
The voltage of above-mentioned electrochemical reaction is preferably 40～50V, anodizing time preferably 15～18 hours.
The concentration of above-mentioned hydrochloric acid soln is preferably 1～1.2mol/L.
The flat-temperature zone temperature range of above-mentioned anneal is preferably 500～600 ℃.
Coaxial heterogeneous CeO of the present invention
2Nanotube-TiO
2Nano-pipe array thin film has unique nano composited tube constitutional features, can realize freely controlling film thickness, outer tube diameter and diameter of inner pipe according to the function needs, have excellent characteristic of semiconductor and sensitive property, but emphasis is applied to fields such as oxygen sensor, photoelectric nano device.
Embodiment
Embodiment 1
Titanium foil is machined into the sheet of 10mm * 20mm, with 240
#, 360
#, 500
#, 800
#, 1500
#Sand paper is polished in advance, and adopting granularity again is that 1.0 diamond polishing cream carries out mechanical polishing, adopts ultrasonic wave ultrasonic oil removing 3 minutes in ethanol, acetone successively subsequently, carries out rinsing with deionized water, oven dry; With the titanium foil after handling is anode, is negative electrode with the platinized platinum, contains 0.3wt%NH
4F and 2vol%H
2The ethylene glycol solution of O is an electrolytic solution, under room temperature and magneton stirring, carries out electrochemical reaction; Wherein: interelectrode distance is 30mm, and voltage is 20V, anodizing time 12 hours; With the rinsed with deionized water generation TiO is arranged
2The anode of nano-tube array---titanium foil, after the drying, supersound process is 0.5 hour in the hydrochloric acid soln of immersion 0.8mol/L, dissolves TiO
2Nanotube; With anode---titanium foil remakes anode, adopts identical processing parameter to carry out secondary oxidation again; With ethanol, deionized water respectively rinsing generate TiO arranged
2The anode of nano-tube array---titanium foil 5 times, anneal is carried out in dry back in retort furnace, and the control temperature rise rate is 1 ℃/min, and the flat-temperature zone temperature range is 500 ℃, and the flat-temperature zone treatment time is 0.5 hour, obtains to be covered with porous TiO
2The titanium substrate of nano-tube array; To have porous TiO subsequently
2The titanium substrate of nano-tube array immersed in the aqueous solution of cerous nitrate of 1mol/L 30 minutes; With the thermal treatment 2 minutes in microwave oven of reacted titanium substrate, obtain the coaxial heterogeneous CeO of one deck then at the titanium substrate surface
2Nanotube-TiO
2Nano-pipe array thin film.
Measuring, above-mentioned coaxial heterogeneous CeO
2Nanotube-TiO
2Nano-pipe array thin film thickness is 45 μ m, and outer tube diameter is 130nm, and diameter of inner pipe is 80nm.
Embodiment 2
Titanium foil is machined into the sheet of 10mm * 20mm, with 240
#, 360
#, 800
#, 1200
#Sand paper is polished in advance, and adopting granularity again is that 1.0 diamond polishing cream carries out mechanical polishing, adopts ultrasonic wave ultrasonic oil removing 5 minutes in ethanol, acetone successively subsequently, carries out rinsing with deionized water, oven dry; With the titanium foil after handling is anode, is negative electrode with the platinized platinum, contains 0.4wt%NH
4F and 3vo l%H
2The ethylene glycol solution of O is an electrolytic solution, under room temperature and magneton stirring, carries out electrochemical reaction; Wherein: interelectrode distance is 30mm, and voltage is 40V, anodizing time 17 hours; With the rinsed with deionized water generation TiO is arranged
2The anode of nano-tube array---titanium foil, after the drying, supersound process is 0.5 hour in the hydrochloric acid soln of immersion 1.Omol/L, dissolves TiO
2Nanotube; With anode---titanium foil remakes anode, adopts identical processing parameter to carry out secondary oxidation again; With ethanol, deionized water respectively rinsing generate TiO arranged
2The anode of nano-tube array---titanium foil 6 times, anneal is carried out in dry back in retort furnace, and the control temperature rise rate is 1.5 ℃/min, and the flat-temperature zone temperature range is 600 ℃, and the flat-temperature zone treatment time is 1.5 hours, obtains to be covered with porous TiO
2The titanium substrate of nano-tube array; To have porous TiO subsequently
2The titanium substrate of nano-tube array immersed in the aqueous solution of cerous nitrate of 1.2mol/L 40 minutes; With the thermal treatment 3 minutes in microwave oven of reacted titanium substrate, obtain the coaxial heterogeneous CeO of one deck then at the titanium substrate surface
2Nanotube-TiO
2Nano-pipe array thin film.
Measuring, above-mentioned coaxial heterogeneous CeO
2Nanotube-TiO
2Nano-pipe array thin film thickness is 70 μ m, and outer tube diameter is 150nm, and diameter of inner pipe is 90nm.
Embodiment 3
Titanium foil is machined into the sheet of 10mm * 20mm, with 240
#, 500
#, 800
#, 1500
#Sand paper is polished in advance, and adopting granularity again is that 1.0 diamond polishing cream carries out mechanical polishing, adopts ultrasonic wave ultrasonic oil removing 4 minutes in ethanol, acetone successively subsequently, carries out rinsing with deionized water, oven dry; With the titanium foil after handling is anode, is negative electrode with the platinized platinum, contains 0.5wt%NH
4F and 5vo l%H
2The ethylene glycol solution of O is an electrolytic solution, under room temperature and magneton stirring, carries out electrochemical reaction; Wherein: interelectrode distance is 30mm, and voltage is 30V, anodizing time 24 hours; With the rinsed with deionized water generation TiO is arranged
2The anode of nano-tube array---titanium foil, after the drying, supersound process is 0.8 hour in the hydrochloric acid soln of immersion 1.2mol/L, dissolves TiO
2Nanotube; With anode---titanium foil remakes anode, adopts identical processing parameter to carry out secondary oxidation again; With ethanol, deionized water respectively rinsing generate TiO arranged
2The anode of nano-tube array---titanium foil 5 times, anneal is carried out in dry back in retort furnace, and the control temperature rise rate is 2 ℃/min, and the flat-temperature zone temperature range is 700 ℃, and the flat-temperature zone treatment time is 2 hours, obtains to be covered with porous TiO
2The titanium substrate of nano-tube array; To have porous TiO subsequently
2The titanium substrate of nano-tube array immersed in the aqueous solution of cerous nitrate of 1.5mol/L 50 minutes; With the thermal treatment 5 minutes in microwave oven of reacted titanium substrate, obtain the coaxial heterogeneous CeO of one deck then at the titanium substrate surface
2Nanotube-TiO
2Nano-pipe array thin film.
Measuring, above-mentioned coaxial heterogeneous CeO
2Nanotube-TiO
2Nano-pipe array thin film thickness is 50 μ m, and outer tube diameter is 110nm, and diameter of inner pipe is 70nm.
Claims (6)
1. coaxial heterogeneous cerium dioxide nano-tube-titanium dioxide nano-pipe array thin film is characterized in that described film is made by following method:
(1) titanium foil is machined into the sheet of 10 ± 2mm * 20 ± 5mm, with 240
#, 360
#, 500
#, 800
#, 1200
#Or 1500
#The sand papering light, adopting granularity again is that 1.0 diamond polishing cream carries out mechanical polishing, adopts ultrasonic wave ultrasonic oil removing 2～5 minutes in ethanol, acetone successively subsequently, carries out rinsing with deionized water afterwards, after the oven dry, stand-by;
(2) being anode with the titanium foil after handling, is negative electrode with the platinized platinum, contains 0.3～0.5wt%NH
4F and 2～5vol%H
2The ethylene glycol solution of O is an electrolytic solution, under room temperature and magneton stirring, carries out electrochemical reaction; Wherein: interelectrode distance is 30 ± 2mm, and voltage is 20～60V, anodizing time 12～24 hours;
(3) with the rinsed with deionized water generation TiO is arranged
2The anode of nano-tube array---titanium foil, after the drying, supersound process is 0.5～1 hour in the hydrochloric acid soln of immersion 0.8～1.5mol/L, dissolves TiO
2Nanotube;
(4) with the described anode of step (3)---titanium foil remakes anode, repeating step (2) carries out two-step anodization;
(5) with ethanol, deionized water respectively rinsing generate TiO arranged
2The anode of nano-tube array---titanium foil 5～6 times, anneal is carried out in dry back in retort furnace, and the control temperature rise rate is 1～2 ℃/min, and the flat-temperature zone temperature range is 500～700 ℃, and the flat-temperature zone treatment time is 0.5～2 hour, obtains to be covered with porous TiO
2The titanium substrate of nano-tube array;
(6) step (5) preparation is covered with porous TiO
2The titanium substrate of nano-tube array immerses in the aqueous solution of cerous nitrate that concentration is 1～1.5mol/L, reacts 0.5～1.5 hour;
(7) with the thermal treatment 2～5 minutes in microwave oven of the reacted titanium substrate of step (6), obtain the coaxial heterogeneous CeO of one deck at the titanium substrate surface
2Nanotube-TiO
2Nano-pipe array thin film.
2. coaxial according to claim 1 heterogeneous cerium dioxide nano-tube-titanium dioxide nano-pipe array thin film is characterized in that: described titanium foil purity is greater than 95%.
3. coaxial according to claim 1 heterogeneous cerium dioxide nano-tube-titanium dioxide nano-pipe array thin film, it is characterized in that: described electrolytic solution is for containing 0.4～0.5wt%NH
4F and 3～4vol%H
2The ethylene glycol solution of O.
4. coaxial according to claim 1 heterogeneous cerium dioxide nano-tube-titanium dioxide nano-pipe array thin film is characterized in that: the voltage of described electrochemical reaction is 40～50V, and anodizing time is 15～18 hours.
5. coaxial according to claim 1 heterogeneous cerium dioxide nano-tube-titanium dioxide nano-pipe array thin film is characterized in that: the concentration of described hydrochloric acid soln is 1～1.2mol/L.
6. coaxial according to claim 1 heterogeneous cerium dioxide nano-tube-titanium dioxide nano-pipe array thin film is characterized in that: the flat-temperature zone temperature range of described anneal is 500～600 ℃.
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Cited By (4)
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|---|---|---|---|---|
| CN102220616A (en) * | 2011-05-26 | 2011-10-19 | 东南大学 | Method for preparing titanium dioxide nanotube array |
| CN103147110A (en) * | 2013-03-18 | 2013-06-12 | 上海交通大学 | Preparation method of multilayer titanium oxide nanotube array |
| CN108149300A (en) * | 2018-01-08 | 2018-06-12 | 电子科技大学 | A kind of CeO2Nano particle/TiO2The preparation method of nano-tube array composite heterogenous junction film |
| CN114188063A (en) * | 2021-12-13 | 2022-03-15 | 中国核动力研究设计院 | Nanotube array-based Schottky junction, preparation method thereof and beta nuclear battery |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102220616A (en) * | 2011-05-26 | 2011-10-19 | 东南大学 | Method for preparing titanium dioxide nanotube array |
| CN102220616B (en) * | 2011-05-26 | 2013-02-27 | 东南大学 | Method for preparing titanium dioxide nanotube array |
| CN103147110A (en) * | 2013-03-18 | 2013-06-12 | 上海交通大学 | Preparation method of multilayer titanium oxide nanotube array |
| CN103147110B (en) * | 2013-03-18 | 2016-08-24 | 上海交通大学 | A kind of preparation method of multilayer titanium oxide nanotube array |
| CN108149300A (en) * | 2018-01-08 | 2018-06-12 | 电子科技大学 | A kind of CeO2Nano particle/TiO2The preparation method of nano-tube array composite heterogenous junction film |
| CN108149300B (en) * | 2018-01-08 | 2019-11-05 | 电子科技大学 | A kind of CeO2Nano particle/TiO2The preparation method of nano-tube array composite heterogenous junction film |
| CN114188063A (en) * | 2021-12-13 | 2022-03-15 | 中国核动力研究设计院 | Nanotube array-based Schottky junction, preparation method thereof and beta nuclear battery |
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| CN102021630B (en) | 2011-12-28 |
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